The American Association of Colleges for Teacher Education is a national alliance of educator preparation programs dedicated to the highest quality professional development of teachers and school leaders in order to enhance PK-12 student learning.

Learning Forward, the former National Staff Development Council (NSDC), is the largest non-profit professional association committed to ensuring success for all students through staff development and school improvement.

The National Board for Professional Teaching Standards advance the quality of teaching and learning by developing professional standards for accomplished teaching, creating a voluntary system to certify teachers who meet those standards and integrating certified teachers into educational reform efforts.

The National Center for Culturally Responsive Educational Systems provides technical assistance and professional development to close the achievement gap between students from culturally and linguistically diverse backgrounds and their peers, and reduce inappropriate referrals to special education.

The Institute for Education Sciences, the U.S. Department of Education's statistical wing, conducted a longitudinal study between 2007 and 2012 to help determine teacher attrition, retention, and mobility. A federal report, http://nces.ed.gov/pubs2015/2015337.pdf addresses public school teacher attrition and formulates teachers with mentors inspired longevity within their field.

Developed by Thirteen/WNET New York, this free service features everything from standards-based lesson plans and classroom activities to a multimedia primer, online mentors, and reviews of curriculum-based websites.